Controls of the chemical composition of particle populations in a macrotidal estuary (Tamar Estuary, U.K.)

Morris, A.W.; Bale, A.J.; Howland, R.J.M.; Loring, D. H.; Rantala, R.T.T.

doi:10.1016/0278-4343(87)90039-2

Cited by 28 publications

(15 citation statements)

References 5 publications

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“…Biogenic silica enrichment on flood tides near the mouth in both fall and spring (Table 2) The regression lines fitting these data share a common intercept statistically and differ only in slope, reflecting the seasonality of the P0C:SPM relationship. Binary mixing of 2 well-defined source materials could account for the seasonal change in slope (Morris et al 1987). One source could be organic-poor material of ten~porally fixed composition, and the other organicrich material of seasonally variable composition.…”

Section: Bulk Spm Compositionmentioning

confidence: 99%

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Biogeochemical characterization of suspended particulate matter in the Columbia River estuary

Prahl¹,

Small²,

Eversmeyer³

1997

Mar. Ecol. Prog. Ser.

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ABSTRACT. In order to understand what controls the composition of suspended particulate material (SPM) in estuarine turbidity maxima (ETM), a set of SPM samples collected in the Columbia River and estuary (northwestern USA) during 3 seasons (fall 1990. summer 1991, spring 1992) -.as analyzed for detrital mineral (Min), total organic matter [OM, as 2 X particulate organic carbon (POC)], biogenic silica (BSI), chlorophyll a, 6' .'~:, and lignin. In most samples, Mm, OM and BSI collectivc,ly accounted for 100'.':, of total SPM mass, although their relative importance changed seasonally. The ETM was a trap for organlc matter during all 3 seasons, which can explaln the intense microbial activity and microcrustacean grazing observed previously. The organic matter was particularly rich in chlorophyll a in late spring to early summer The source of this seasonal enrichment was mainly rivenne phytoplankton. The organic matter contribution to ETM from the ocean was mlnor compared to the river, but apparently not negligible. Despite large seasonal variations in chlorophyll content, the 6°C of POC concentrated in ETM remained nearly constant between -26 and -25.S4':,,. Vascular plant debris, as depicted by lignin phenol content, always comprised a minor fraction of the organic matter in ETM, dllhuuyh ET>l had h~g h e r lignin levels than the OM of surrounding waters. Intertidal mudflats arc. I! not an additional source of organic mattclr at least a n i m p o r t~~n t site for transforming riverine organic matter that is ultimately concentrated in ETh4.

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Section: Bulk Spm Compositionmentioning

confidence: 99%

“…It should be noted here that we use the convention l/SPM (with units of 1 mg-l) in order to feature most effectively by graphic means particle mixing in the estuary (e.g. see Morris et al 1987) In particular, using l/SPM allows us to better focus on ETM as endmembers to mixing curves; e.g. In Fig.…”

Section: Bulk Spm Compositionmentioning

confidence: 99%

Biogeochemical characterization of suspended particulate matter in the Columbia River estuary

Prahl¹,

Small²,

Eversmeyer³

1997

Mar. Ecol. Prog. Ser.

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“…carbonates, organic matter) is present and also acts as an important sorbent phase. The two-component (permanent and temporary SPM) particle-mixing model (Morris et al 1987) used to describe SPM and associated trace metal variations during resuspension processes (Turner et al 1994;Williams and Millward 1998) does not apply to the observations of this study. The nonconformity of the results to the particle-mixing model is due to the closeness in the composition of the temporarily resuspended bottom sediments and permanently suspended sediments.…”

Section: Discussionmentioning

confidence: 97%

Particulate trace metal and major element distributions over consecutive tidal cycles in Port Jackson Estuary, Australia

Hatje

2003

Env Geol

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Particulate trace metal (Cu, Cr, Ni, Pb and Zn) and major element (Fe, Mn and Al) concentrations have been determined following intensive sampling over two consecutive spring tidal cycles in the 'turbidity maximum zone' (TMZ) of the Port Jackson estuary, Australia. Salinity, temperature, pH, dissolved oxygen, suspended particulate matter (SPM) and chlorophyll a were also determined. A three-factor analysis of variance was used to test temporal variability in concentrations of particulate trace metals and major elements as a result of tidal oscillation. Estuarine master variables, such as temperature and pH, varied within a narrow range; nevertheless, the tidal signal was clear for surface and bottom waters. In surface water, no variance was detected in SPM concentrations between consecutive tidal cycles or between tidal stages (i.e. flood, ebb and slack water). In bottom water, however, SPM concentrations were significantly higher (P £ 0.05) at flood tide than at slack high water and ebb tide. Concentrations of particulate trace metals and major elements in surface water do not display significant variability between tidal cycles or stages. Nevertheless, differences within each tidal stage were significant (P £ 0.05) for all elements. In bottom water, only particulate Fe and Al exhibited significant differences (P £ 0.05) between tidal cycles, whereas particulate Ni was the only trace element that presented significant differences (P £ 0.05) between tidal stages, following the distribution of SPM, with highest concentrations at flood tide. Among the metals studied, significant variation was found at all three temporal scales examined (i.e. from hours to consecutive tidal cycles), although the patterns of variation were different for each metal. The semi-diurnal fluctuation of SPM and particulate trace metal concentrations during spring tides is interpreted as a resuspension-deposition cycle caused by cyclical oscillations of bottom currents. The results are discussed in the context of the implications of tidal cycle influence on the geochemistry and cycling of particulate trace metals in the Port Jackson estuary.

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“…As mentioned above, some of uncorrected POC fluxes were much higher than those of primary production, suggesting that bottom sediment resuspension could be likely associated with the elevated POC fluxes in the ECS. First, we used a vertical particle mixing model derived by Morris et al (1987) to obtain two end member values: one with high POC content and low total suspended matter (TSM), and the other with low POC content and high TSM (Bloesch, 1994 in Eq. (1) (Bale and Morris, 1998).…”

Section: Using a Vertical Particle Mixing Model To Correct Poc Fluxmentioning

confidence: 99%

Behavior and fluxes of particulate organic carbon in the East China Sea

Hung

Tseng²,

Gong³

et al. 2013

Preprint

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To better understand carbon cycling in marginal seas, particulate organic carbon (POC) concentrations, POC fluxes and primary production (PP) were measured in the East China Sea (ECS) in summer 2007. Higher concentrations of POC were observed in the inner shelf and lower POC values were found in the outer shelf. Similar to POC concentrations, elevated uncorrected POC fluxes (720–7300 mg C m⁻² d⁻¹) were found in the inner shelf and lower POC fluxes (80–150 mg C m⁻² d⁻¹) were in the outer shelf, respectively. PP values (~340–3380 mg C m⁻² d⁻¹) had analogous distribution patterns to POC fluxes, while some of PP values were significantly lower than POC fluxes, suggesting that contributions of resuspended particles to POC fluxes need to be appropriately corrected. A vertical mixing model was used to correct effects of bottom sediment resuspension and the corrected POC fluxes ranging from 41 ± 20 to 956 ± 443 mg C m⁻² d⁻¹, which were indeed lower than PP values. The results suggest that 49–93% of the POC flux in the ECS might be from the contribution of resuspension of bottom sediments rather than from the actual biogenic carbon sinking flux. While the vertical mixing model is not a perfect model to solve sediment resuspension because it ignores biological degradation of sinking particles, Changjinag plume (or terrestrial) inputs and lateral transport, it makes significant progress in both correcting resuspension problem and in assessing a reasonable quantitative estimate in a marginal sea

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Controls of the chemical composition of particle populations in a macrotidal estuary (Tamar Estuary, U.K.)

Cited by 28 publications

References 5 publications

Biogeochemical characterization of suspended particulate matter in the Columbia River estuary

Biogeochemical characterization of suspended particulate matter in the Columbia River estuary

Particulate trace metal and major element distributions over consecutive tidal cycles in Port Jackson Estuary, Australia

Behavior and fluxes of particulate organic carbon in the East China Sea

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